
Cladonia gracilis or the smooth cup lichen is a species of fruticose, cup lichen in the family Cladoniaceae. It was first described as a new species by Carl Linnaeus in his 1753 work Species Plantarum. German botanist Carl Ludwig Willdenow transferred it to the genus Cladonia in 1787. In North America, it is known colloquially as the "smooth Cladonia".
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Is it poisonous?
We have no record of Smooth Horn Lichen being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.
Easily confused with
- Cladonia rei
- Cladonia verticillata
- Cladonia phyllophora
- Cladonia maxima
- Cladonia ramulosa
- Cladonia crispata
Classification
- Kingdom
- Fungi
- Phylum
- Ascomycota
- Class
- Lecanoromycetes
- Order
- Lecanorales
- Family
- Cladoniaceae
- Genus
- Cladonia
- Species
- Cladonia gracilis
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